Self-heating sad-iron.



PATENTED JULY 3., 1906.

R. WUFFLI. SELF HEATING SAD IRON.

APPLICATION FILED HALS, 1905.

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PATENTED JULY 3. 1906.

R. WUFFLI.

SELF HEATING SAD IRON.

APPLICATION YLBD MAR. 8, 1905.

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UNITED STATES PATENT oEEicE.

Specification of Letters Patent.

Patented July 3, 1906.

I Application filed March 8,1905. Serial No. 249,091.

To all whom, it may concern,.-

Be it known that I, ROBERT WUFFLI, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Self-Heat' Sad-Irons; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in self-heating sad-irons; and the improvement consists in the construction and arrangement of parts substantially as herein shown and described, and more particularly pointed out in the claim.

One of the difficulties encountered in the use of self-heating sad-irons is in maintaining the iron at a unlform temperature over its entire ironing-surface, and especially when the iron is under constant use and engaged with wet and cold surfaces.

A further difficulty is met in supplying the proper amount of air to the burner so that perfect combustion takes place within the iron and also in preventing the flames from escaping at the sides ofthe iron near its bottom.

My object is to overcome the foregoing difficulties and to provide a sad-iron adaptable to the use of either artificial or natural gas.

In the accompanying drawings, Figure 1 is a side elevation of my improved sad-iron, and Fig. 2 is a front end view thereof. Fig. 3 is a cross-sectional View on line x Fig. 1, and Fig. 4, a central longitudinal section on line y y, Fig. 3. Fig. 5 is a horizontal sectional view of the iron on linee z, Fig. 4.

The main body A of the iron has the usual flat ironing base portion 2 and end posts 3, projecting upward therefrom and upon which cover B is secured by screws 4. A handle C is bolted to cover B, and a strip of asbestos or other heat-insulating material 5 is inserted between said handle and the cover .to keep the metal portions out of contact and the outer air for the admission of air for gasburner D, but are closed at their outside or outer wall 9 at all points opposite the burner to prevent the egress of the flame which plays over bottom 2 from side to side. Inner walls 10 of passages 7 are rovided with a series of openings 11 their ll length opposite burner D to permit the proper amount of air to commingle with the gas from burner D,

'and thereby promote instant combustion at the very bottom of the iron. The flame generated does not rise much above the top wall of channels 7, but plays downward and spreads from side to side and fills the space over bottom 2 where it is most needed. I find that by locating the air-admission openings 12 Iof channels 7 at the extreme ends of the iron and walled from the burner a free supply of air in sufficient quantities can always be obtained to promote proper com- -bustion of all the gases from burner D and that no surplus gases escape or are confined' within the iron.

' Outer Walls 9 have an upper beveled edge 13, and upon each wall is a side plate 14, also beveled at its lower edge, which engages edge 13 and continues the side Wall of the sad-iron to a short distance below cover B. Depending lugs 15 on said cover engage the top edge of plate 14 and hold the same in place. Plate 14 is preferably perforated or slotted in any suitable manner along its full length for the escape of surplus heat.

Burner D is a detachable member comprising a tube 20, which is provided with a series of semicircumferential slots 21, arran ed at uniform distances apart substantial y the full length of said tube and at its bottom. A removable lug 22, semicircular in cross-section and sligiitly tapering, with a head 23, is inserted within tube 20 to lessen the gas-confining area within the tube Substantially midway of the tube to its outer end, and thereby provide for a more equal distribution of gas the full length of said burner and over the entire surface of the bottom 2 of the sad-iron. I find that without this provision an unequal distribution of gas is obtained and danger of explosion from confined surplus gas is apt to occur, especially when lighting the burner. Tube 20 is screwed into an elbow or casting 24,' which forms a rear inclosing plate fastened by screws 25 upon rear posts 3 and whereby the burner as a whole is supported and fixed upon and within the sad-iron body. A short' rui., l

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pipe 26 is set at an inclination and screwed in casting-plate 24 as a continuation of tube 20 and is threaded at its upper end to permit an adjustable connection with a mixer-cap 27, adapted to support the valved gas -inlet member 28. A series of openings 28 in the side wall of cap 27 admits air to pipe 26 in as great a quantity as may be needed and as determined by the open space between the end of pipe 26and the opposite surface 29 on cap 27. A jamb-nut 30 locks the cap in the relation as set. By this arrangement either artificial or natural gas may be used in burner D with equal results. When natural gas is used, it is best to use a smaller gas-outlet than for artificial gas, and to this end I provide a tapering screw-threaded tip 31, which is a removable part of member 28 and is adapted to rest and be held by friction or setscrew within tapering seat 32 of cap 27 and whereby one form of tip may be substituted by another. The usual llexible hose con- -closed to the outer air between their ends and provided with inlet-openings along their inner sides, in combination with a burner centrally over the base of said body and closed at its top and provided with openings along its sides opposite said inlet-openings.

In testimony whereof I sign this specification in the presence of two witnesses.

ROBERT WUFFLI.

Witnesses:

R. B. MOSER, C. A. SELL. 

